Improvement in seal-locks



* F. C. HAMILTON.

Seal-Locks.

NO. 134,474. Patented Dec. 31, 1872.

Watnesses inventor.

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FRED G. HAMILTON, OF NEW YORK, N. Y., ASSIGNOR TO EDWARD J. BROOKS, OFSAME PLACE.

iMPROVEMENT IN SEAL-LOCKS.

Specification forming part of Letters Patent No. H3d,4l74i, datedDecember 31, 1872.

To all whom it may concern:

Nature and Objects of the Invention.

This is an improvement in locks adapted for securing the doors offreight-cars and for other analogous uses. The nature of the inventionconsists in adapting the same look for the reception of both a seal ofsheet metal, constituting a portion of the lock, and also a Brooks glassseal. It may also be adapted for the reception of seals of some otherkinds, as hereina-fter described. The objects of the invention are toadapt the lock to the purposes or preferences of different individualsor corporations and to permit the application to one and the same lookof seals or private marks of different individuals as an additionalmeans of security.

Description of the Accompanying Drawing.

Figure l is a front elevation of a lock, illustratin g minvention. Fig.2 is a vertical longitudinal section of the same on the line no ac,Fig. 1. Fig. 3 is an underside view thereof.

. General Description.

Ais a bow or shackle,the endsa a of which slide within mortises in thebar B. The longer end a of the shackle is bifurcated, and has pivotedwithin it at c a hasp, O. This hasp and the shank a of the shackle arecorrespondingly notched from opposite faces to adapt them for thereception of a seal, S, of sheet metal, which is formed with aperforation to receive the said hasp, and when the latter is closed, asshown by full lines in Fig. 2, prevent any further movement of the saidhasp in the direction indicated by the arrow, while its retraction isprevented by the catch D, thrown out by spring E.

In another application for Letters Patent of even date herewith, I havedescribed and claimed this mode of using a sheet-metal seal,

so that it will constitute a part of the lock itself.

In my present improvement I have adapted the device for use inconnection with a Brooks glass seal, which is shown at S inserted in aseat in the sliding shank of the shackle, and confined by the frame B,through an aperture in which the said glass seal is viewed when the lockis closed. 0 is a spring-catch working in the frame B and engaging in anaperture in the shank a, protected by the glass seal S, sothat the saidseal must be broken before the springcatch O can be pushed back and theshackle released.

To adapt the hasp O of my sheet-metal seal S to work more convenientlyin connection with the devices for retaining the glass seal, I haverecessed both the shank and the hasp to receive the sheet-metal seal, sothat when the hasp is closed it may be flush with the surface of theshank, and when the seal is broken and removed the hasp itself willoffer no resistance to the sliding of the shank in order to open thelock.

As an additional means of security I have provided for the use of aMears wire-and-head seal, or other analogous seal, as shown at S bypassing the loop thereof through an aperture in the shank a; and,further, for the ap plication of a simple lead-rivet seal in the end ofa of the shackle, as shown at S3.

Claims.

FRED o. HAMILTON.

Witnesses:

E. J. BRooKs, JAMES HARRIS.

